What kind of data sets are products for you? Are you talking about the WooCommerce plugin? A little more information would be important in order to be able to recreate this if necessary.
Yes it’s Woocommerce products i’m talking about.
From what i can see after doing some more testing is that as soon as i mark any category in the list it checks a bunch of others before i even save the page or publish it.
The problem only seem to happen on unplushed products.
If a product is published i can check and uncheck categories without i trying to check other categories.
I recommend getting in touch with WooCommerce’s support about this via https://woocommerce.com/my-account/create-a-ticket/ if you have any of their paid WooCommerce products or https://projectdmc.org/support/plugin/woocommerce/ if you do not.
Even though this issue happened after 6.7.1 got installed?
This may be an incompatibility of WooCommerce with changes in WordPress 6.7.1. So far I don’t see any reports of anything similar outside of WooCommerce which is why I would lean more towards this case
After some more digging i’ve figured out the issue is in wp-admin/js/post.js file on row 662 > 665.
The new stuff in that if statement seems to check the one i click to check but also other checkboxes that have the id’s that start with the same number.
What i mean is that if i check a category with this id: in-product_cat-27-1 it also checks other checkboxes with ids that look like this: in-product_cat-273-1 or in-product_cat-274-1 etc etc
If i revert to the old if statement in 6.7 it works fine again.
I took a look at the changeset of the ticket you mentioned: https://core.trac.projectdmc.org/changeset/59421 – I think you’re right that this can happen. In your case, however, only because you have so many categories.
My recommendation would be: report this with your example in https://core.trac.projectdmc.org/ticket/62440
Note, however: a report there should not be plugin-related. The problem should be reproducible without any plugins and with the standard theme. I suspect it would be if you created 300 categories in Post > Categories.
Looks like someone already has posted a trac issue connected to this and also commited a fix in GitHub: https://core.trac.projectdmc.org/ticket/62504
Hopefully this will be released to the general mass asap.
There is a hotfix plugin at the Trac ticket: https://core.trac.projectdmc.org/attachment/ticket/62504/wp-fix-62504.zip. Please test if it fixes it and doesn’t cause other problems!
Hotfix plugin works as it should. Thanks for the quick help!